checking for empty fields

[heiiumzz]

hey guys, i am creating a register application, but would like to it to check for empty fields, any idea how can i do it?

		if($password1 == $password2){
			$query = "INSERT INTO users(user_id,username,password,email,address,phone) VALUES ('".$user_id."','".$username."',SHA1('".$password1."'),'".$email."','".$address."','".$phone."')";
			$status = mysqli_query($link,$query) or die(mysqli_error($link));
			if($status){
			$message = '<p>Your new account has been successfully created. You are now ready to <a href="login.html">login</a>.</p>';
			$message .= '<p><a href="index.php">Home</a></p>';
			}
		}else{
			$message = '<p class="error">Passwords do not match.<a href="register.html">Back</a></p>';
		}
	}

I have tried several codes like,

if(empty($_POST['username'])){
   echo "Empty username!";
}

if (empty($username)) {
Print("Please fill in all fields!<br>");
}

But it doesnt work. please lend some help 🙂
Thanks in advance.

[dagon]

empty() should work fine

[heiiumzz]

you mean like this?

if (empty()) { 
Print("Please fill in all fields!<br>"); 
}

[dagon]

obviously you need to provide the variable to check

$username='';

if (empty($username)) {
Print("Please fill in all fields!<br>");
} 

works as expected

[heiiumzz]

so i rewrite the codes...

       

if (empty($username)) {
Print("Please fill in all fields!<br>");
}

 if($password1 == $password2){ 
            $query = "INSERT INTO users(user_id,username,password,email,address,phone) VALUES ('".$user_id."','".$username."',SHA1('".$password1."'),'".$email."','".$address."','".$phone."')"; 
            $status = mysqli_query($link,$query) or die(mysqli_error($link)); 
            if($status){ 
            $message = '<p>Your new account has been successfully created. You are now ready to <a href="login.html">login</a>.</p>'; 
            $message .= '<p><a href="index.php">Home</a></p>'; 
            } 
        }else{ 
            $message = '<p class="error">Passwords do not match.<a href="register.html">Back</a></p>'; 
        } 
    }

It becomes like this?

I provided the variable for it to check already.

$username = $_POST['username'];

🙂

[heiiumzz]

anyone? 😕

[dagon]

are you sure its empty? are you sure your checking the right form field? are you sure you know what php considers to be empty and what it doesn't?